NPFC - FF-W-100
WASHER, LOCK (TOOTH)
| Organization: | NPFC |
| Publication Date: | 29 January 1969 |
| Status: | active |
| Page Count: | 12 |
scope:
This specification covers tooth lockwashers for use in assemblies with bolts, studs and machine screws (see 6.1).
Tooth lockwashers shall be of the following types, grades, styles and compositions.
Type I - Internal Tooth Flat. Grade A - Regular. Grade B - Heavy-Duty. Type II - External Tooth Flat. Type III - Internal-External Tooth Flat. Type IV - External Tooth Countersunk (80°−82°). Type V - External Tooth Countersunk (99°−101°). Style 1 - Twisted Teeth. Style 2 - Teeth with up-and-down bent edges. Composition 1 - Carbon Steel. Composition 2 - Corrosion-resisting steel. Composition 3 - Phosphor bronze. Composition 4 - Tin brass.
intended Use:
The tooth lockwashers covered by this specification are intended for automotive, aircraft, and general industrial applications. These washers serve to lock fasteners to the component part of an... View More
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